Instruction manual

Page 4 10-1008-177 Rev 1
TECHNICAL INFORMATION
Sequence of Operation
The air conditioner comes standard with one internally mounted thermostat. When the unit is plugged in, the
evaporator fan will be running.
Cooling
When the enclosure temperature is above the cooling thermostat setpoint, power is applied through the time
delay relay. After the delay time the contactor is energized and the compressor starts. The condenser fan will
start once the compressor starts. Component specific information is listed below.
Operating the air conditioner below the minimum ambient temperature or above the maximum ambient
temperatures indicated on the nameplate voids all warranties.
The moisture that the enclosure air can contain is limited. If moisture flows from the drain tube continuously this
can only mean that ambient air is entering the enclosure. Be aware that frequent opening of the enclosure’s
door admits humid air that the air conditioner must then dehumidify.
Standard and Optional Component Operation
Thermostat
The LB16 air conditioner uses our standard 52-6155-02 thermostat. The thermostat setpoint equals the
temperature that the air conditioner turns off. The thermostat has an adjustable differential from setpoint until it
calls for cooling; the typical differential is 5°F. An example of operation is shown below.
For cooling (75-100°F range):
Tstat setpoint = 80° F
Cooling turns on at 85° F
Cooling turns off at 80° F
Time Delay Relay
Factory set for 6 minutes (top dial at 1-10 minutes, bottom dial at 6)
The purpose of the time delay relay is to prevent short cycling of the compressor.
Contactor
The contactor uses a 230V coil.